Block copolymers of ϵ-caprolactam and oxirane prepared by the activated anionic polymerization of ϵ-caprolactam
✍ Scribed by J. Stehlíček; J. Šebenda
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 427 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
A~tract--Block copolymers polycaprolactam-polyoxyethylene-polycaprolactam were prepared by anionic polymerization of caprolactam activated with ~,~o-dicarbonylcaprolactam-polyoxyethylenes and characterized by the content of the polyether component, crystallinity of the polyamide component and sorption of water.
📜 SIMILAR VOLUMES
The non-activated polymerization of e-caprolactam initiated with the sodium salt of e-caprolactam (CLNa), which was prepared in situ with sodium methoxide, was studied in the temperature range 170 -230 8C and at CLNa concentrations from 0.20 to 1.0 mol-%, and at 190 8C in the presence of 2.0 -10.0 m
## Abstract Anionic polymerization of ϵ‐caprolactam was initiated with the potassium salt of ϵ‐caprolactam and accelerated with phenyl isocyanate, toluylene diisocyanate, 4,4′‐diphenylmethane diisocyanate, some derivatives of these isocyanates (urethanes, ureas, and allophanates), or combinations o
ABA block copolymers, where A and B represent polyamide and polystyrene segments respectively, were prepared by the anionic polymerization of caprolactam activated with polystyrene-bisacyllactams. Under mild polymerization conditions (in a solvent at 120°), very pure copolymers were obtained contain
In the reaction between the potassium salt of E-caprolactam and N-propionyl-e-caprolactam or N-benzoyl-~-caprolactam in tetrahydrofuran at 25;, the consumption of both reactants and the formation of structures giving ketones by hydrolysis were investigated. Analysis of the data allowed determination
The N-sodiocaprolactam-catalysed anionic polymerisation of e-caprolactam is activated by e-caprolactone which itself acts as a comonomer, yielding copolyesteramides. At lower temperatures and lower catalyst concentrations, copolymerisation of the lactone is favoured over that of lactam; higher tempe